A prenuptial agreement is only valid if it is completed prior to marriage. After a couple is married, they may draw up a post-nuptial agreement. In the United States, prenuptial agreements are recognized in all fifty states and the District of Columbia.
Osmosis - the diffusion of water (across a membrane) Water will move in the direction where there is a high concentration of solute (and hence a lower concentration of water. A simple rule to remember is: Salt is a solute, when it is concentrated inside or outside the cell, it will draw the water in its direction.
In biology, Osmosis is defined as the diffusion of water across a cell membrane. This process accounts for many functions that maintain life. In relation to blood and plant cells, blood cells placed in pure distilled water will swell and burst, while plant cells remain turgid because the cell wall prevents bursting.